Locking slider



June 16, 1942. A j 2,286,373

LOCKING SLIDER Filed Sept. 13, 1941 v 2 Sheets-Sheet '1 5. 8 INVENTOR DAVID RABINOW 2 )4 A'rromsfrs June 16, 1942.

D. RABINOW LOCKING SLIDER Filed se tfls, 1941 2 Sheets-Sheet 2 r a ATI'ORNEYS INVENTOR DAVID RABINOW Patented June 16, 1942 STATES David Rabinow, Elizabet poems semen h, J., assignorto Geri-- mar Products Qorporation, Newark, N. 3., a corporation of New Jersey Application September 1;

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Q i Serial No. 410,670

14 Glaims. (or. 24-205) This invention relates to slide fasteners.

The primary object of the invention is to generally improve slide fasteners, and more particularly locking sliders for the same. A more spe- Fig. 17 is a similar view showing the use of similar camming pivots on a one-piece pull.

cific object is to provide an automatic springprises a slider body generally designated B prooperated locking slider for use with conventional vided with a lug pivotally carrying a lever L. The slide fasteners or zippers. Such fasteners comslider further comprises a pull generally desigprise elements having interlockable projections nated P, said pull being pivoted 'on lever L and and recesses, and jaws which are clamped on having a locking tooth T. A spring S operates the beaded or-corded edges of tapes to form the on lever L and urges the pull-carrying end of the lever toward the slider, in order to bring the tooth into locking engagement with the elements of the slide'fastener (said elements being conventional and being omitted from the drawings in order to better show the structure of the slider itself). It will be understood that the lockin tooth T is so disposed and dimensioned relative to the lever L and the pull P that the tooth is moved out of engagement with the fastener elements to unlock the slider when the pull is raised Fig. l is a front elevation of a locking slider Fig. 2 is a section taken approximately in the plane 2-:2 of Fig.' 1;

Fig. 3 is a partially sectioned side elevation of the slider with the parts in unlocked condition;

Fig. 4' is a front elevation of the lowerend .of the .slider with the lockifiginechanism removed;

fl Fig. is a perspective view showing the upper cation of my invention utilizing a two-piece pull;

Fig. 10 is a section taken approximately in the plane of the line Ill-40 of Fig. 9;

Fig. 11 is a partially sectioned side elevation showing the parts in unlocked condition;

. Fig. 12 is a front elevation of still another modified form of the invention employing a torslon spring for the lever;

Fig. 13 is a section taken approximately in the plane of the line l3l3 of Fig. 12;

Fig. 14 is a partiallysectioned side elevation of a modification of the invention in which the lever is cammed upwardly by non-circular pivots on the pull;

Fig. 15 is a front elevation of the same;

Fig. 16 is a. perspective'view showing the inner portion of the two-piece p l; and

preparatory to moving the slider.

the elements of the slide fastener. The walls 12 any desired fashion as, for example, by welding.

' The construction of the slider body itself may be riveted at its ends to hold it against axial movement.

- Only the upper end of the pull P is shown. The locking tooth T is formed integrally on the pull and projects inwardly toward the fastener elements within the slider. The front wall I2 01' the slider is cut away-to form an aperture or window 32, best shown in Fig. 4, through which the locking tooth T passes (see Fig. 2) to a po-- sition between adjacent fastener elements. The pull P is pivotally mounted on the lever L by urged to the locking position shown in Fig; 2 by a spring 36 which, in the present case, is a coiled compression spring disposed between the upper .end of lever L and the neck portion l6 of the slider. The upper end of lever L may be turned embodying featuresof my/invention;pM Referring nown morefieclfically to Figs. 1

through 5, the locking slider there shown comprises a slider body 13 having front and back walls l2 and I4 secured together at a neck portion It. The walls l2 and M are appropriately flanged, as is indicated at l8 and 20, for cooperation with means of pivots 34. The lever'L is normally.

inwardly, as indicated at 88, to form a protective shield for spring 86. This inward projection may, if desired, be' made of proper length to act as a stop for the mechanism, as will be described subsequently. m

l2 of the slider, and causing the lever L to turn from the position shown in Fig. 2 to that shown in Fig. 3. Meanwhile the locking tooth T is moved outwardly from the locking position shown in Fig. 2, to theunlocked position shown in Fig. 3.

ent structure, the outward motion of the pull 58 is again shown limited by a three-point contact; first the contact of the ends 64 of the pull with the front wall of the slider; second the con- 5*tact of theptooth T with the bottom wall 66 of the window meiving thesame; and third, the contact of the wide upper end of lever L with the slider body on each side of the indented neck portion. These contact are illustrated in Fig. 8.

In the sliders so far described, the angle through which the pull may be raised is rather limited. If it is desired that the pull be swung through a very large angle, that result may be accomplished by using a two-piece pull,'instead The unlocking movement of the parts maybe of a one-piecerpullr such a'modiflca on limited by appliopriately dimensioning the parts, In Fig. 3 the turning movement of lever L is liniited Wtheslgp 38 which bears against the neck portion i6 of tmliderNAt the same time the ends 48 of the pull bear agains the slider. Moreover, the tooth T bears against the lower end 42 of the window 32. Thus the motion of the parts is limited by engagement of the movable mechanism with the slider at three lustrated in Figs. 9, 10 and 11 of the drawings, in which it will be seen that the pull comprises an outer portion I8 pivotally connected to the lower end of an inner portion 12. The inner portion efroniewmlz carrie the locking tooth T and swings over onlrahmited arc of movement (corresponding to the moveme ull when using a rigid one-piece pull). However, the outerpart-lunay be moved over a much larger arc of movement.

different points. However, it may be explained For example, itmay assume the position 18' that a three-point contact of the character shown is not necessary, a two-point contact being adequate. Thus, if a stop action by the parts 38 and 48 is preferred, it is not necessary for the tooth T to contact the wall 42. If contact at the points 48 and 42 is employed, the stop 38 is not required. In actual practice a two-point contact is preferred, in order to provide greater tolerance in the manufacture of the parts by eliminating the need for .contact at the third Figs. 6, '7, and 8. As before, the slider body B comprises front and back walls secured together at a neck portion which,-in this case, includes a rivet 44. The front wall of th'slider-iiprgided of the figures of the drawings m Another form of the invention is illustrated in 5 shown in broken lines in Fig. 11 when pulling the slider downwardly, and may assume the position 18 shownin solid lines when pulling the slider upwardly.

The two-piece pull.is pivotally mounted on a lever l6'which in turn is pivqtally mounted on tions, and that a single lug instead of a pair of spaced lugs may be used for carrying the lever.

40 It will be observed that ,the outer portion 18 of the pull is bifurcated and provided with integral pivots 84. In general, various combinations of the different, pivot constructions shown innall used.

"Ifhe stops for limiting the movement of the inner portions 12 orTHeswo-piece p co spond to those shown in Fig. 8 thatis, the end of vthe pull bears against the front wall of the 'slider at the same time that the tooth bears with a lug 46 for pivotally mounting'a lever 4 8, 5o 8-gainst t he lower end of the slot receiving the but in the. present case there is only a single central lug, instead of two spaced lugs. A spring 58 is disposed between the upper end of lever 48 and the neck of the slider, this spring being a strip v of spring metal, one end of which is secured to the neck, as by means of the rivet 44, while the opposite end is turned. inwardly beneath the lever, as will be clear from inspection of Figs. 7 and 8.

The lever 48 is cut away at the center to re- 00 ceive the Mg 46. Inasmuch as it is stronger and more economical'to useintegrally formed pivots, rather than a separate pin of necessarily small diameter, the lever 48 is preferably bifurcated and provided with pivots 54 formed integrally on 5 the inner edges of its branches. The branches are joined at the bottom but are separated. at the top, as isindicated at 56. These branches are. initially spread apart but are closed to the parallel position shown when assembling the parts,

thereby bringing the pivots 64 into a mating hole in lug 46.

The 'pull'68 is a bifurcatedpull with integrally formed pivots 68 and an integrally formed tooth bifurcated upper end 84 of lever 86 is carried. The pullP is bifurcated and provided with integral pivots 98 received in the inwardly bent lower end of lever 98. The spring 8 is coiled about pivot pin 92 and one end I88 overlies lever 86, while the opposite end I82 bears againstthe neck portion of the slider. The action of the spring causes the lever L to move the locking tooth T into engagement with the fastener elements, as is illustrated by the broken line position of the parts in Fig. 13. When the pull is raised the slider isunlocked, as is indicated by the solid line position of the parts in Fig. 13.

Still another form of the invention is illus- 2, just as was previously described. In ptettrflted in F18 .15. an 1 In h fi r tially encloses the lug I04.

the lever.

aaeasve' ing tooth of the pull into locking engagementthe slider body 13 diflers from those previously described in having a single central lug I04 which extends for an appreciable distance'longitudinally of the slider. The lever L is an outwardlyconvex hollow sheet-metal body which substan- The side walls I06 of lever L receive a pivot pin I08 which passes through the lever and lug. Spring S is alsmall leaf spring III], one end of which is anchored in a mating slot in lug which bears against the uppenend of the lever, thereby tending to move the same to the normally locked position shown in broken lines in Fig. 14. 1

The pull has branches 2 (Figs. and 16) with pivots II formed integrally on the inner edges thereof. These pivots are not circular, but instead are elongated, as is best shown in Fig. 16. The edges of the side walls I06 of the lever are preferably arcuately cut away, as is indicated at H6, for cooperation with pivots Ill acting as camming means. In other words, when the pull is raised from the broken line position to the solid line position shown in Fig. 14, the pivots IN bear outwardly against'and raise the lever to the solid line position shown. At-the same time the tooth T is moved to unlock the slider. When the pull is released, the spring H0 turns the lower end of the lever inward, which in turn bearsagainst the pull and moves it to the flat or locking position shown in broken lines in Fig. 14. The relation of the parts is such that the pull cannot be removed from the slider, even though the pivots ar not received in closed apertures in Round pivots may be used in closed apertures, in which case the projecting ends of the pull will bear against the front wall of the slider, to raise the lever, much as was previously described.

In Figs. 14, 15, and 16, the pull is a two-piece pull comprising an outer portion I20 pivoted to an inner portion I22, the inner portion I22 having the pivots I I A and the tooth T. It will be I understood, however, that the same construction may be used with a single piece pull, and this is illustrated in Fig. 17, which shows a one-piece pull the upper end of which is formed like the upper end of the two-piece pull shown in Fig. 16.

It is believed that the construction and operation, as well as the many advantages of my improved automatic locking slider, will be apparent from the foregoing detailed description thereof. It will also be apparent that while I have shown .and described my invention in several pre ferred forms, many changes and modifications may be made in the structure disclosed, without. departing from the spirit of the invention as sought to be defined in the following claims.

1. A locking slider for a-slide fastener, said slider comprising a lug, a lever pivoted on the I04, and the other end of lug, a pull pivoted on the lever, a locking tooth on the pull, and a spring operating on said lever and urging the pull-carrying end of the lever toward the slider in order to bring the locking tooth of the pull into locking engagement with the elements of the slide fastener.

2. A locking slider for a slide fastener, said Slider comprising appropriately flanged front and back walls secured together at a neck portion, a'lug on the front wall, a lever pivoted onthe lug, a pull pivoted on the lever, 'a-locking tooth on the pull, anda spring operating on said lever and urging the pull-carrying endof the' lever toward the slider in order to bring the lockwith the elements of the slide fastener, said tooth being so disposed and dimensioned that it is moved away from the fastener elements to un'- lock the slider when they pull is raised preparatory to moving the slider.

3. A locking slider for a slider comprising a lug, a lever pivoted on the lug, a pull pivoted on the lever, a locking tooth on the pull, and a spring operating on said lever and urging the pull-carrying end of the lever toward the slider in order to bring the locking tooth bears against the upper end of the lever, while the pull is pivoted on the lower end of the lever,-

with the lug located intermediate the ends of the lever.

' 5. A slider as defined in claim 1, in which the pull is bifurcated at its upper end and has pivots formed integrally on the inner edges thereof and. received in the lower end of the lever.

6. A slider as defined in claim 1, in which the lever is a bifurcated member having pivots formed integrally on the inner edges thereof and received in the lug.

'1. A slider as defined in claim 1, in which the lever is a bifurcated member having pivots formed integrally on the inner edges thereof and received in the lug, and in which the pull is bifurcated at its upperend and has pivots formed integrally on the inner edges thereof and received at the lower end of the lever.

8. A slider as defined in claim 1, in which the pull is a two-piece pull having an outer portion and an inner portion, the inner portion carrying the locking tooth and having a limited outward movement, the outer portion being'pivoted on the inner portion and having a relatively unlimited outward movement.

, 9. A slider as defined in claim 1, in which the pull is a two-piece pull having an outer portion and an inner portion, the inner portion carry.- ing the locking tooth and having a limited outward movement, the outer portion being pivoted on the inner portion and having a relatively unlimited outward movement, said outer portion being bifurcated and having pivots formedintegrally on the-inner edges thereof, and received in mating recesses on theinner portion.

10. A. slider as defined in claim 1, in which the pull is a two-piece pull having an outer portion and an inner portion, the inner portion carrying locking tooth and having a limited outward movement, the outer portion being pivoted on the inner portion and having a relatively unlimited outward movement, said inner portion being bifurcated and having pivots formed inslide fastener, said the inner portion and having a relatively unlimited outward movement, said. inner portion being bifurcated and having pivots formed inte grally on the inner edges thereof and received at mating recesses on the lever,'said outer portion being bifurcated and having pivots formed integrally on the inner edges thereof and received in mating recesses on the inner portion. r

12. A-slider as defined in claim 1, in which the lever is in the form of a convex housing surrounding the lug and the spring.

13. A slider as defined in claim 1, in which the,

lever is in the form of a convex housing surrounding the lug and the spring, and in which the pull is a bifurcated member having pivot portions formed on the inner edges thereof and abutting the lug and received between the slider and the inner edges of the lever, said pivots being non-circular and acting as camming mem'- bers bearing against and raising one end of the lever when the pull is raised'to' operate the slider.

14. A slider as defined in claim 1, in which the lever is in the form of a convex housing surrounding the lug and the spring, and in which the pull is a bifurcated member having pivot portions formed on the inner edges thereof and 

